Working with QSystemStorageInfo - System Information API

Article Metadata

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Code Example

Source file: Media:SystemStorageInfo.zip

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Tested with

Devices(s): Nokia 5800 xPressMusic

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Compatibility

Platform(s): S60 3rd Edition, FP1, FP2

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Platform Security

Signing Required: Self-Signed

Capabilities: None

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Article

Keywords: QSystemStorageInfo, QString, QStringList, QButton, QLabel, QComboBox

Created: kiran10182 (10 Mar 2010)

Last edited: hamishwillee (04 Nov 2011)

Overview

This article shows how to use QSystemStorageInfo API which is a part of the System Information API from Qt Mobility project.

What is covered in QSystemStorageInfo API

• It is a part of the System Information API.
• This article covers information about
  • Available drives of the device
  • Available disc space of the particular drive
  • Total disc space of the particular drive
  • Type of the particular drive

Capabilities required

• None

UI design (.ui file)

Project configuration file (.Pro file)

• Add the Qt Mobility project configuration option in the .Pro file as shown below

CONFIG += mobility
MOBILITY += systeminfo

Implementing QSystemStorageInfo API

• QSystemStorageInfo API is a part of the QtMobility namespace. So declare the QtMobility namespace as shown below:

using namespace QtMobility;

Header file

#ifndef SYSTEMSTORAGEINFO_H
#define SYSTEMSTORAGEINFO_H
 
#include <QtGui/QWidget>
#include "ui_SystemStorageInfo.h"
#include <qsysteminfo.h>
 
using namespace QtMobility;
class SystemStorageInfo : public QWidget
{
    Q_OBJECT
 
public:
	SystemStorageInfo(QWidget *parent = 0);
    ~SystemStorageInfo();
 
public slots:
	void listLogicalDrives();
	void listDriveInformation(int aDriveIndex);
	void resetAllFields();
 
private:
    Ui::SystemStorageInfo ui;
    QSystemStorageInfo* storageInfo;
};
 
#endif // SYSTEMSTORAGEINFO_H

Source file

#include "SystemStorageInfo.h"
 
SystemStorageInfo::SystemStorageInfo(QWidget *parent)
    : QWidget(parent), storageInfo(NULL)
{
	ui.setupUi(this);
 
	storageInfo = new QSystemStorageInfo();
 
	QObject::connect(ui.driveComboBox, 
					SIGNAL(currentIndexChanged(int)),
					this, 
					SLOT(listDriveInformation(int)));
	QObject::connect(ui.storageInfoButton, 
					SIGNAL(clicked()),
					this, 
					SLOT(listLogicalDrives()));	
	QObject::connect(ui.resetButton, 
					SIGNAL(clicked()),
					this, 
					SLOT(resetAllFields()));
}
 
SystemStorageInfo::~SystemStorageInfo()
{
	delete storageInfo;
}
 
void SystemStorageInfo::listLogicalDrives()
{
	if(ui.driveComboBox->count() > 1)
	{
		//this has been called previously and combo box contains data already
		ui.driveComboBox->showPopup();
		return;
	}
	QStringList list = storageInfo->logicalDrives();
	ui.driveComboBox->addItems(list);
	ui.driveComboBox->showPopup();
}
 
void SystemStorageInfo::listDriveInformation(int aDriveIndex)
{
	if(aDriveIndex == 0)
	{
		resetAllFields();
		return;
	}
	// Set available disc space label
	QString textValue = ui.driveComboBox->itemText(aDriveIndex);
	qlonglong availableSpace = storageInfo->availableDiskSpace(textValue);
	QString str = QString::number(availableSpace);
	ui.availabelDiscSpaceLabel->setText(str);
 
	// Set total disc space label
	qlonglong totalSpace = storageInfo->totalDiskSpace(textValue);
	str = QString::number(totalSpace);
	ui.totalDiscSpaceLabel->setText(str);
 
	// Set drive type label
	QString labelValue;
	QSystemStorageInfo::DriveType drvType = storageInfo->typeForDrive(textValue);
	switch(drvType)
	{
		case QSystemStorageInfo::NoDrive:
		{
			labelValue = ("No drive");
			break;
		}
		case QSystemStorageInfo::InternalDrive:
		{
			labelValue = ("Internal Drive");
			break;
		}
		case QSystemStorageInfo::RemovableDrive:
		{
			labelValue = ("Removable Drive");
			break;
		}
		case QSystemStorageInfo::RemoteDrive:
		{
			labelValue = ("Remote Drive");
			break;
		}
		case QSystemStorageInfo::CdromDrive:
		{
			labelValue = ("CD ROM Drive");
			break;
		}
		default:
		{
			break;
		}
	}
	ui.driveTypeLabel->setText(labelValue);
}
 
void SystemStorageInfo::resetAllFields()
{
	ui.driveComboBox->setCurrentIndex(0);
	ui.availabelDiscSpaceLabel->clear();
	ui.totalDiscSpaceLabel->clear();
	ui.driveTypeLabel->clear();
}

Output

Useful functions

• QStringList logicalDrives ();
• qlonglong availableDiskSpace ( const QString & volumeDrive );
• qlonglong totalDiskSpace ( const QString & volumeDrive );
• QSystemStorageInfo::DriveType typeForDrive ( const QString & driveVolume );

Headers

• #include <qsysteminfo.h>

Classes

• QSystemStorageInfo
• QString
• QStringList
• QButton
• QLabel
• QComboBox

Example Application

• A working example application is available to download from here: QSystemStorageInfo.zip

Related articles

• Getting started with Qt Mobility APIs
• Setting up environment for Qt Mobility API
• Working with Carbide.c++ IDE for Qt Mobility APIs
• Working with QSystemInfo - System Information API - Part 1
• Working with QSystemInfo - System Information API - Part 2
• Working with QSystemDeviceInfo - System Information API - Part 1
• Working with QSystemDisplayInfo - System Information API
• Working with QSystemNetworkInfo - System Information API - Part 1
• Working with QSystemNetworkInfo - System Information API - Part 2

Reference links

• Qt - cross-platform application and UI framework
• Qt Mobility API
• New Qt APIs Beta - Mobility Project
• SDK help